(22) باب أَفْضَلُ الصَّلاَةِ طُولُ الْقُنُوتِ
Jabir reported:
The Messenger of Allah (ﷺ) was asked about the prayer which was most excellent. He said: That in which the standing is longer. (This hadith is narrated by another chain of transmitters too.)
Reference: Sahih Muslim 756 b
In-book reference: Book 6, Hadith 198
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1653